allMasks: simplify for more efficiency
allMasks: simplify for more efficiency

Now the mask permutations simply take the bit pattern from the argument
int. The previous implementation was a hack and not suitable at all for
simd_array<T, 32>.

Signed-off-by: Matthias Kretz <372ea4eca737a13cd010ee806d4ce7b98ee71550@kde.org>

chr-engwer/Vc,VcDevel/Vc,VcDevel/Vc,chr-engwer/Vc,VcDevel/Vc,VcDevel/Vc,chr-engwer/Vc